2.2.2 spase://VITMO/NumericalData/TIMED/GUVI/Electron_Density_Product TIMED GUVI L2B Electron Density Profiles 2011-10-21T12:00:00.000 The Level-2 Electron Density Profiles data product contains F-region electron density as a function of altitude and latitude derived from the GUVI limb data. Summaries of estimated peak electron density and total electron content are also given as Level 3 products. The profiles are derived from the 135.6-nm channel of the GUVI limb data. The 135.6-nm emission at night is due almost exclusively to recombination of O+ ions. Since O+ is the primary ion in the F region, the 135.6-nm volume emission rate is closely related to the square of the electron density. Details of the procedure of producing the electron densities are given in: DeMajistre, R., L.J. Paxton, D. Morrison, J-H. Yee, L.P. Goncherenko and A.B. Christensen, Retrievals of nighttime electron density from Thermosphere Ionosphere Mesosphere and Dynamics (TIMED) mission Global Ultraviolet Imager (GUVI) Measurements, J. Geophys Res., 109, A05305, doi:10.1029/2003JA010296. NASA, Andrew B. Christensen spase://SMWG/Person/Andrew.B.Christensen PrincipalInvestigator Electron Density Profiles description http://guvi.jhuapl.edu/site/data/documents/guvi_Level2_edp_datainfo.pdf spase://SMWG/Repository/TIMED/GUVI_POC Online Open GUVI POC L2B Electron Density Product (IDLsave) Data Request http://guvi.jhuapl.edu/site/data/data_fetch/l2b_edp_netcdf.shtml This web page allows the request of data files for this product. To request data: select the year and day then press display. NetCDF None NASA, Andrew B. Christensen spase://SMWG/Repository/NASA/GSFC/SPDF Online Open CDAWeb http://cdaweb.gsfc.nasa.gov/sp_phys/ TIMED_EDP_GUVI TIMED GUVI L2 data with subset, plot, list from CDAWeb Text Please acknowledge the support from the CDAWeb team at GSFC/SPDF. Calibrated GUVI L2B Electron Density Product Level 2B spase://SMWG/Instrument/TIMED/GUVI Profile 2002-03-22T00:00:00.000Z 2007-12-11T00:00:00.000Z Earth.NearSurface.Ionosphere TIMED GUVI lower thermosphere MLTI Geographic Latitude glat Geographic Latitude (registered at ~300km) degrees Dimensions: [n] - where n is the number of profiles (i.e., records) in an orbital file (n is approximately 136). Positional Geographic Longitude glon Geographic Longitude (registered at ~300km) degrees Dimensions: [n] - where n is the number of profiles (i.e., records) in an orbital file (n is approximately 136). Positional Geomagnetic Latitude mlat Geomagnetic (simple dipole) Latitude (registered at ~300km) degrees Dimensions: [n] - where n is the number of profiles (i.e., records) in an orbital file (n is approximately 136). Positional Geomagnetic Longitude mlon Geomagnetic (simple dipole) Longitude (registered at ~300km) degrees Dimensions: [n] - where n is the number of profiles (i.e., records) in an orbital file (n is approximately 136). Positional Time time Universal Time of observation in number of milliseconds since start of current day. Timestamp marks beginning of interval ms 1e-3>s Dimensions: [n] - where n is the number of profiles (i.e., records) in an orbital file (n is approximately 136). 0 86399999 Temporal Electron Density ep Electron Density Profiles Data cm-3 23 Dimensions: [23,n] - where 23 is the number of levels in a profile; n is the number of profiles (i.e., records) in an orbital file (n is approximately 136). Electron NumberDensity Retrieved Uncertainty in Electron Density sigep Retrieved Uncertainty in Electron Density cm-3 23 Dimensions: [23,n] - where 23 is the number of levels in a profile; n is the number of profiles (i.e., records) in an orbital file (n is approximately 136). Electron NumberDensity Volume Emission Rate ver Volume Emission Rate Rayleighs 23 Dimensions: [23,n] - where 23 is the number of levels in a profile; n is the number of profiles (i.e., records) in an orbital file (n is approximately 136). Electromagnetic Emissivity Uncertainty in Volume Emission Rate sigver Uncertainty in Volume Emission Rate Rayleighs 23 Dimensions: [23,n] - where 23 is the number of levels in a profile; n is the number of profiles (i.e., records) in an orbital file (n is approximately 136). Electromagnetic Emissivity Atomic Oxygen Density Profile oden Atomic Oxygen Density Profile (from MSIS) cm-3 23 Dimensions: [23,n] - where 23 is the number of levels in a profile; n is the number of profiles (i.e., records) in an orbital file (n is approximately 136). Atom NumberDensity Uncorrected Volume Emission Rate ver0 Volume Emission Rate (no mutual neutralization correction) Rayleigh 23 Dimensions: [23,n] - where 23 is the number of levels in a profile; n is the number of profiles (i.e., records) in an orbital file (n is approximately 136). Electromagnetic Emissivity Uncertainty in Uncorrected Volume Emission Rate sigver0 Uncertainty in Volume Emission Rate (no mutual neutralization correction Rayleighs 23 Dimensions: [23,n] - where 23 is the number of levels in a profile; n is the number of profiles (i.e., records) in an orbital file (n is approximately 136). Electromagnetic Emissivity Chapman Layer Maximum Density nmf2 Chapman Layer Maximum Density cm-3 Dimensions: [n] - where n is the number of profiles (i.e., records) in an orbital file (n is approximately 136). Other Chapman Layer Maximum Radius rmf2 Chapman Layer Maximum Radius km Dimensions: [n] - where n is the number of profiles (i.e., records) in an orbital file (n is approximately 136). Other Chapman Layer Topside Scaleheight hmf2 Chapman Layer Topside Scaleheight unitless Dimensions: [n] - where n is the number of profiles (i.e., records) in an orbital file (n is approximately 136). Other Uncertainty in Chapman Layer Maximum Density signmf2 Uncertainty in Chapman Layer Maximum Density cm -3 Dimensions: [n] - where n is the number of profiles (i.e., records) in an orbital file (n is approximately 136). Other Uncertainty in Chapman Layer Maximum Radius sigrmf2 Uncertainty in Chapman Layer Maximum Radius km Dimensions: [n] - where n is the number of profiles (i.e., records) in an orbital file (n is approximately 136). Other Uncertainty in Chapman Layer Topside Scaleheight sighmf2 Uncertainty in Chapman Layer Topside Scaleheight unitless Dimensions: [n] - where n is the number of profiles (i.e., records) in an orbital file (n is approximately 136). Other AACGM Geomagnetic Latitude acmlat Geomagnetic (AACGM) Latitude (registered at ~300km) degrees Dimensions: [n] - where n is the number of profiles (i.e., records) in an orbital file (n is approximately 136). Positional AACGM Geomagnetic Longitude acmlon Geomagnetic (AACGM) Longitude (registered at ~300km) degrees Dimensions: [n] - where n is the number of profiles (i.e., records) in an orbital file (n is approximately 136). Positional Earth radius re Earth radius at the given geographic latitude km Dimensions: [n] - where n is the number of profiles (i.e., records) in an orbital file (n is approximately 136). Other Index map ind Index map into level 1B file unitless Dimensions: [n] - where n is the number of profiles (i.e., records) in an orbital file (n is approximately 136). Other EDP/VER radius grid k_nonpar_r EDP/VER radius grid where altitude grid is (k_nonpar_r - re) km 23 Dimensions: [23] - where 23 is the number of levels in a profile. Other Observational Angles for Observation k_nonpar_thetapix Observational Angles for Observation where tangent altitudes are (625.+Re)*sin(k_nonpar_thetapix) - re radian 32 Dimensions: [32]. Other Chapman Layers Parameters Existence flag pf If 1, chapman layers parameters present, 0 if not 1 Dimensions: [1] - a single value per orbital file. Other Radiances at 135.6 nm prof Radiances at 135.6 nm Rayleigh 32 14 Dimensions: [32,14,n] - where n is the number of profiles (i.e., records) in an orbital file (n is approximately 136). Other Uncertainties of Radiances at 135.6 nm dprof Uncertainties of Radiances at 135.6 nm Rayleigh 32 14 Dimensions: [32,14,n] - where n is the number of profiles (i.e., records) in an orbital file (n is approximately 136). Other H+ Correction flag hpcor H+ correction from IRI made, -1 if not 1 Dimensions: [1] - a single value per orbital file. Other Number of limb scans for smoothing ncomb(nonvariant_var) Number of limb scans for smoothing 1 Dimensions: [1] - a single value per orbital file. Other k_nonpar_w0 448 Dimensions: [448,n] - where n is the number of profiles (i.e., records) in an orbital file (n is approximately 136). Other k_nonpar_w1 448 Dimensions: [448,n] - where n is the number of profiles (i.e., records) in an orbital file (n is approximately 136). Other k_nonpar_w0c 32 2 Dimensions: [32,2]. Other k_nonpar_w1c 32 2 Dimensions: [32,2]. Other k_par_r 50 Dimensions: [50]. Other k_par_thetapix 32 Dimensions: [32]. Other k_par_w0 448 50 Dimensions: [448,50]. Other k_par_w1 448 50 Dimensions: [448,50]. Other